Philips and ZOLL together hold the largest installed base of public-access AEDs in U.S. workplaces, and the question of which brand to buy is the single most-searched AED comparison query on Google. The honest answer comes down to one trade-off: Philips offers the clearest voice prompts and largest field-tested install base; ZOLL offers real-time CPR feedback that measurably improves chest compression quality. Everything else is secondary.
Head-to-head spec comparison
| Spec | Philips HeartStart OnSite | ZOLL AED Plus |
|---|---|---|
| Price (AED Leader) | $1,589 | $2,082 |
| Pad shelf life | 2 years | 5 years |
| Battery life | 4 years | 5 years |
| Pad replacement cost | $99 | $230 (CPR-D) |
| CPR feedback | Voice prompts only | Real-time depth + rate via pads |
| Warranty | 8 years | 7 years |
| IP rating | IP21 (indoor only) | IP55 (indoor + outdoor) |
| Weight | 3.3 lb | 6.7 lb |
| Pediatric pathway | Separate pediatric pads (M5072A) | Pedi-Padz II (separate set) |
| 10-year device + consumables | $2,483 | $2,412 |
The real decision driver: CPR feedback
The single biggest functional difference is what happens during chest compressions. The ZOLL AED Plus’s CPR-D pads include accelerometers that measure compression depth and rate in real time, telling the rescuer “Push Harder” or “Good Compressions” out loud. AHA 2020 ECC Guidelines explicitly endorse real-time CPR feedback as improving compression quality. Philips offers voice prompts, but no compression-depth measurement, under stress, most rescuers under-compress on adult patients, and ZOLL closes that gap.
Verdict by use case
Best for offices, schools, retail
Philips HeartStart OnSite
Lower upfront cost, longer warranty, and the largest U.S. field-deployment history. Voice prompts are the clearest in the category. For environments where rescuers are unlikely to face muscular adult patients, the CPR-feedback advantage matters less.
Best for gyms, athletic facilities, and healthcare
ZOLL AED Plus
Real-time CPR depth coaching for muscular gym members or athletic patients is genuinely better. 5-year pads cut maintenance by 60%. IP55 supports humid pool decks and outdoor sports. Higher upfront cost pays back in operational simplicity.
Pros and cons
Philips wins on
- Lowest upfront cost
- Longest warranty (8 years)
- Clearest voice prompts
- Largest U.S. install base · familiar with EMS
- Lightest unit (3.3 lb)
Recertified prices across all seven models
Recertified units are the same models under the same FDA premarket approvals, restored, tested and sold with a minimum three year warranty.
| Model | New | Recertified | You keep | Buy |
|---|---|---|---|---|
| Philips HeartStart OnSite | $1,589 | $875 | $714 (45%) | AED Leader or Response Ready |
| Philips HeartStart FRx | $2,099 | $875 | $1,224 (58%) | AED Leader or Response Ready |
| ZOLL AED Plus | $2,082 | $875 | $1,207 (58%) | AED Leader or Response Ready |
| ZOLL AED 3 | $2,399 | $1,150 | $1,249 (52%) | AED Leader or Response Ready |
| HeartSine Samaritan PAD 350P | $1,411 | $875 | $536 (38%) | AED Leader or Response Ready |
| HeartSine Samaritan PAD 450P | $1,761 | $875 | $886 (50%) | AED Leader or Response Ready |
| Cardiac Science Powerheart G5 | $2,157 | $1,225 | $932 (43%) | AED Leader or Response Ready |
Prices verified 30 September 2026 against the public product data of both stores. Both list identical recertified prices, so buy from whichever fits your order size: AED Leader for one to four units, Response Ready for five or more and for compliance and fleet programmes. New prices are the AED Leader list price on the same date.
The honest risk. A recertified AED is a used device. The three year minimum warranty is what makes the saving worth taking. Read recertified versus new and how to choose a refurbished AED before you decide.
ZOLL wins on
- Real-time CPR feedback
- 5-year pad shelf life
- IP55 rating (outdoor capable)
- Long battery life (CR123A pack)
- Better for athletic / adult patients
Pricing and 10-year TCO
Philips wins the upfront sticker by $493. ZOLL claws all of that back over 10 years through 5-year pads (2 replacement cycles vs. 5 for Philips). Net 10-year TCO comes out to about $2,483 (Philips) vs $2,412 (ZOLL) per device , a 3% gap that’s overshadowed by use-case fit. For full TCO modeling, see our 10-Year Cost of an AED Program guide or run the math in the AED Cost Calculator.
Reliability and recall history
Both brands have field-tested reliability. ZOLL has limited historical recall volume. Philips conducted notable FR2 and FRx-series recall actions between 2017 and 2022, all closed per FDA closure letters. The current generation operates under updated quality systems. Cross-reference with our AED Brand Reliability Rankings and the FDA Medical Device Recall Database.
Frequently Asked Questions
Is Philips or ZOLL better for a workplace AED?
Philips for general office workplaces (lower cost, longer warranty). ZOLL for gyms, athletic facilities, healthcare, and pool decks (CPR feedback + IP55).
Why is ZOLL more expensive than Philips?
ZOLL CPR-D pads include compression-depth sensors that add manufacturing cost. The 5-year pad life is partially offset by reduced replacement frequency.
Do Philips and ZOLL pads work on each other’s devices?
No. AED pads are brand-locked. Using non-OEM pads voids warranty and creates liability.
Which is easier to maintain, Philips or ZOLL?
ZOLL on the cost-per-year-of-coverage metric (5-year pads). Philips on upfront simplicity (cheaper consumables when due).
Is the Philips HeartStart Home the same as the OnSite?
Functionally, yes, same internal hardware, marketed for residential use vs. workplace.
Both models, priced today
Prices checked 30 September 2026 at AED Leader. Each link opens our full review with the buy path.
- Philips HeartStart OnSite (M5066A) review and price$1,589 to $1,819New, 8-year manufacturer warranty
- ZOLL AED Plus review and price$2,082New, 5-year warranty (7 with ZOLL registration)
- ZOLL AED 3 review and price$2,399New, 6-year warranty (8 with ZOLL registration)
Get hands-on AED training in under 3 hours.
Sources & References
- AHA, 2020 CPR & ECC Guidelines
- FDA, Medical Device Recall Database
- Manufacturer specifications: Philips HeartStart, ZOLL AED Plus
Disclaimer: Prices are AED Leader list prices, checked September 2026. Verify current with authorized resellers.
